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Water 2017, 9(12), 927;

An Experimental Study of Two-Phase Pulse Flushing Technology in Water Distribution Systems

School of Computing and Digital Technologies, Staffordshire University, Stoke on Trent ST4 2DE, UK
School of Engineering and the Built Environment, Birmingham City University, Birmingham B4 7XG, UK
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
Author to whom correspondence should be addressed.
Received: 17 October 2017 / Revised: 20 November 2017 / Accepted: 21 November 2017 / Published: 5 December 2017


The deterioration of drinking water during distribution process is caused by many factors. The microorganisms and substances peeling off from the “growth-ring” make the secondary pollution in drinking water distribution systems. To reduce the secondary pollution, two-phase pulse flushing technology is introduced to quickly remove the “growth-ring”. In this study, experiment is undertaken for investigating the efficiency of the two-phase pulse flushing and finding the best setting combination. A case study is undertaken to compare the efficiencies between the two-phase pulse and the single-phase flushing. The best setting combination of the two-phase pulse flushing is at the frequency 4 s–6 s (air inflow time is 4 s and air cut off time is 6 s) and the round air inflow nozzle is set at the bottom of the pipe. Two-phase pulse flushing technology can save 95% of water and 6 h 40 min flushing time. View Full-Text
Keywords: water distribution system; secondary pollution; growth-ring; flushing water distribution system; secondary pollution; growth-ring; flushing

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tang, Z.; Wu, W.; Han, X.; Zhao, M. An Experimental Study of Two-Phase Pulse Flushing Technology in Water Distribution Systems. Water 2017, 9, 927.

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